Fire-mouth for kilns.



No. 634,223. Patented ont. 3, |899. w. m. vlALL.

FIRE 00TH FDR KILNS.

(Application tiled Aug. 4, 1899.)

(No Model.)

I 'J l Ivg. 2.

UNITED STATES PATENT \VALTER M. VIALL, OF BARBERTON, OHIO.

FIRE-MOUTH FOR KILNS.

SPECIFICATION forming part of Letters Patent No. 634,223, dated October3, 1899.

Application filed llngustll, 1899. Serial No. 726,099. (No model.)

T0 all whom it may concern:

Be it known that I, WALTER M. VIALL, a citizen of the United States,residing at Barberton, in the county of Summit and State of Ohio, haveinvented a certain new and useful Improvement in Fire-Months for Kilns,of which the following is a specification.

My invention has relation to improvements in the firing-places,technically termed firemouths, of kilns for burning sewer-pipe andkindred articles. These kilns are ordinarily circular in form and areprovided at intervals with firing-places, in which the fuel is burned insuch manner that the products of combustion pass into the interior ofthe kiln and thence through aperforated floor into an underground flueto the chimney.

The object of my invention is to so construct the fire-mouth vthat thebitumen of the coa-l will be driven off in the form of gas and passblazing into the kiln.' The coke formed in the process will be pushed byeach addi-- tional charge of fuel into a connected chamber, where it isfed with fresh air, and becoming intensely heated adds its heat to thegaseous product of the coal, thereby securing complete combustion andenabling the ware in the kiln to be burned with a much less consumptionof fuel than has heretofore been necessary for the purpose.

To the aforesaid object my invention consists in the peculiar and novelconstruction, arrangement, and combination of parts hereinafterdescribed and then specifically pointed out in the claim, referencebeing had to the accompanying drawings, forming a part of thisspecication.

In the accompanying drawings, in which similar reference -numeralsrepresent like parts in both views, Figure I is an elevation of a partof a kiln embodying my invention, and Fig. 2 a section of the same atthe line X X.

Referring to the figures, l is the kiln-wall, and 2 the top, having atintervals chimneys 3 to assist in permitting the escape of heat to coolthe kiln after the burning is completed.

About the base of the kiln are two concentric walls 4 5, the latterbeing the greater. The fire-mouths are, as hereinbefore, located atintervals, and the construction of them and the adjacent parts are thusdescribed: In the main wall is an arch 6, closed during burning andopened at the proper period of burning to introduce salt to effect aglazing of the ware. l

Below the arch 6 in the wall 4t is an arch 7, through which the coal isfed, and below these .arches are two concentric arches S 9 in the wall5, the former serving to sustain and complete the wall at that point andto permit the entrance of air directly into the fuel. The second iscontinued substantially to the inner line of the wall l, and beyond thefront is perforated by means of spaced brick, and this is technicallycalled the lire-table and practically forms the grate, while the spacebeneath constitutes the ash-pit 11. Inside the kiln, back of theseseveral arches, is a brick partition 10, reaching above the salt-arch G,connected at each end by means of wing-Walls with the inside of thekiln-wall to form a recess, technically termed the bag, inclosing` thearches 6 7 8 9, the p bottom of which is bricked up nearly to the arch9.

In operation coal is fed through the arch 7 and falls on the lire-table,where it burns, being fed with air between the arches S 9 and throughthe perforated fire-table 9, the products 0f combustion passing upwithin the bag to the interior of the kiln. In this part the bitumen isdriven oif in gas, and as new coal is introduced the coke thus producedis pushed over into the bag, where it receives air-from the ash-pit l1and continues to burn until reduced to ashes, the products of combustionmingling in the bag with the gas from the coal and producing a completecombustion, carrying into the kiln an intense heat entirely free fromsmoke.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, isl An improved flre-mouth for kilns consisting of anarched opening for iring extended infront of the kiln-wall, anair-duct-below and extended in front of said firing-opening, afire-table of open brickwork extending from the front of the air-duct tothe inner line of the kiln-wall, and abag within and connected with saidside walls, opening into said kiln above said firing-opening andinclosing and internally connected with said lire-table and ash-pit,substantially as shown and described.

In testimony that I claim the above I hereunto set my hand.

VALTER M. VIALL.

In presence of- C. P. HUMPHREY, C. E. HUMPHEEY.

IOO

